1* Microchip ENC28J60
2
3This is a standalone 10 MBit ethernet controller with SPI interface.
4
5For each device connected to a SPI bus, define a child node within
6the SPI master node.
7
8Required properties:
9- compatible: Should be "microchip,enc28j60"
10- reg: Specify the SPI chip select the ENC28J60 is wired to
11- interrupts: Specify the interrupt index within the interrupt controller (referred
12              to above in interrupt-parent) and interrupt type. The ENC28J60 natively
13              generates falling edge interrupts, however, additional board logic
14              might invert the signal.
15- pinctrl-names: List of assigned state names, see pinctrl binding documentation.
16- pinctrl-0: List of phandles to configure the GPIO pin used as interrupt line,
17             see also generic and your platform specific pinctrl binding
18             documentation.
19
20Optional properties:
21- spi-max-frequency: Maximum frequency of the SPI bus when accessing the ENC28J60.
22  According to the ENC28J80 datasheet, the chip allows a maximum of 20 MHz, however,
23  board designs may need to limit this value.
24- local-mac-address: See ethernet.txt in the same directory.
25
26
27Example (for NXP i.MX28 with pin control stuff for GPIO irq):
28
29        ssp2: ssp@80014000 {
30                compatible = "fsl,imx28-spi";
31                pinctrl-names = "default";
32                pinctrl-0 = <&spi2_pins_b &spi2_sck_cfg>;
33
34                enc28j60: ethernet@0 {
35                        compatible = "microchip,enc28j60";
36                        pinctrl-names = "default";
37                        pinctrl-0 = <&enc28j60_pins>;
38                        reg = <0>;
39                        interrupt-parent = <&gpio3>;
40                        interrupts = <3 IRQ_TYPE_EDGE_FALLING>;
41                        spi-max-frequency = <12000000>;
42                };
43        };
44
45        pinctrl@80018000 {
46                enc28j60_pins: enc28j60_pins@0 {
47                        reg = <0>;
48                        fsl,pinmux-ids = <
49                                MX28_PAD_AUART0_RTS__GPIO_3_3    /* Interrupt */
50                        >;
51                        fsl,drive-strength = <MXS_DRIVE_4mA>;
52                        fsl,voltage = <MXS_VOLTAGE_HIGH>;
53                        fsl,pull-up = <MXS_PULL_DISABLE>;
54                };
55        };
56